Do All Spiders Have Eight Legs? Here's The Truth On Web Makers!

Joan Agie
Oct 27, 2023 By Joan Agie
Originally Published on Nov 28, 2021
Birdeater tarantula spider in nature.

Spiders are often misunderstood to be insects, however, they are not insects.

Spiders are in class Arachnids. All spiders are members of the Arthropod family and they are very similar to scorpions, ticks, and mites.

To explain spiders in the simplest way, spiders are arthropods that have eight legs. They are found almost everywhere in the world, apart from the Antarctic.

Spiders have four pairs of legs, meaning they have eight legs. Almost every species of spider is able to produce silk, and their four pairs of legs help them to walk perfectly on their silk webs which they use to catch insects.

They are eight-legged and they have two pairs of coxal glands which are essential for them. They are usually situated at the third coxae. Out of the eight legs that spiders have, the front legs are called pedipalps.

Their body is divided into two segments, whereas insects have a three-segment body. Spiders have compound eyes and some of them have such evolved eyes that can even see the red spectrum.

If you enjoyed this article, why not check out more spider facts and does cold weather kill fleas here on Kidadl?

Do spiders always have eight legs?

Not every insect that has eight legs is a spider but all spiders have four pairs of legs. Spiders use their legs in multiple ways and spider species use their front legs to sense a number of things, as they don't have antennae.

The eight legs of spiders have a lot of different uses. This species often use their front pairs to sense better. They often prey on insects and eat them after throwing digestive fluids on them.

Female spiders usually don't go out much, so the spider that you see is a male spider. Spider legs have tiny hairs which help insects to get stuck in their silk webs. These species have evolved over time to use their eight legs wisely and in the most beneficial way.

Are there any spiders that don't have eight legs?

It's very rare to catch spiders that don't have four pairs of legs. Spiders have evolved over time to have two spare legs in order to hunt easily. Evolution plays a major role when it comes to the number of spider legs.

However, some scientists believe that spiders don't need four pair of legs. An adult spider without an extra leg can prey better and also form webs easily.

Almost every spider present in the world has a similar number of legs. Spiders use their legs to prey on insects and to find and catch food. However, it has been found that spiders do not use all four legs when hunting and building webs.

Scientists came to the conclusion that spiders have some pair of legs that they don't really need. There are no spiders that less than eight legs, so if you see a spider with six legs, it is likely that they have lost these legs.

It has been found that a spider without four pairs of legs can also build webs and hunt with the same efficiency. However, there is a special use for these legs in the wild.

It is not a problem to a spider if it loses one pair of legs when escaping from a predator.

Also, if a spider gets bitten on a limb it won't really harm them because they can still go on living with the same efficiency. The extra legs in some way help them in case they lose a leg or two.

Can spiders regrow legs?

A spider can lose up to two legs and still function properly, however, it's been found that spiders with five legs build weird webs and often struggle to hunt.

It is lucky for spiders because they are able to regrow their legs. In most cases if they have lost a leg or two, they are able to grow it back.

Most species of spiders shed their skin as they grow.

A spider keeps growing throughout its life and shedding its skin makes space for its growing body. Most spiders are able to regrow a leg but the leg often grows to be thinner or shorter than the original leg.

Regeneration is not new in spiders, they can regenerate their front legs and even their mouthparts if they happen to lose them in an unfortunate event.

The silk spinners can also be regenerated, however, when it comes to the regeneration of their legs it can take a spider almost three to four molts for their leg to match the size of the other legs. The initial leg will be weaker and thinner but over time it can grow back to the original size.

What happens if a spider loses all of its legs?

Spiders can work perfectly fine if they lose up to two legs. However, once a spider loses almost three to four legs, this is an issue. However, there are no naturally six-legged spiders.

If a spider loses all its legs, it will indeed be in a very vulnerable state and it is very prone to being hunted by larger animals in the wild. However, spiders have the habit of shedding.

Shedding is natural in spiders because they have an exoskeleton. Over their lifetime they keep growing, and shedding helps them by making space for their growing body.

It is possible for spiders to regrow their legs. Spiders have the ability to regenerate, thanks to shedding.

When a spider loses all its legs, it can grow them back but it will definitely take a lot of time. During this time there are chances of them being hunted by animals in the wild.

If they manage to survive, then it will take three to four molts for their legs to regrow. The initial set that comes is weak and thin but over time the legs grow stronger and become of the same size as the initial legs.

There is a myth that spiders bleed to death if their legs fall apart, however that doesn't happen. They don't feel any pain. Legs usually break at specific points and those points contain muscles which help to prevent blood loss.

Here at Kidadl, we have carefully created lots of interesting family-friendly facts for everyone to enjoy! If you liked our suggestions for Do all spiders have eight legs? Here's the truth on web insects! Then why not take a look at what is the smartest bird, or why is Venus hotter than Mercury.

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Written by Joan Agie

Bachelor of Science specializing in Human Anatomy

Joan Agie picture

Joan AgieBachelor of Science specializing in Human Anatomy

With 3+ years of research and content writing experience across several niches, especially on education, technology, and business topics. Joan holds a Bachelor’s degree in Human Anatomy from the Federal University of Technology, Akure, Nigeria, and has worked as a researcher and writer for organizations across Nigeria, the US, the UK, and Germany. Joan enjoys meditation, watching movies, and learning new languages in her free time.

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